supermarket refrigerated showcase » article > walk-in display coolers > refrigerated showcase display cooler helps you interpret the precautions of refrigeration equipment when handling refrigerant
refrigerated showcase display cooler helps you interpret the precautions of refrigeration equipment when handling refrigerant
author: supermarket refrigerated showcase category: walk-in display coolers Views: 550Time: 2016-08-22
(1) Regardless of ammonia compressor or fluorine compressor, when pressure relay and differential pressure relay are installed, short-circuit them before pumping down, otherwise they cannot Complete the task of pumping refrigerant in the system well.
(2) Before all overhauls are exhausted, all valves should be opened except for the valves that separate the high and low pressure sections, especially the ammonia system cannot have the valves that should be opened, leaving dead corners, and being carelessly affected during maintenance. Violation of ammonia. The liquid supply solenoid valve of the Freon system should be normally open.
(3) For low-pressure supermarket refrigerated showcase equipment, where the ambient temperature is low and the internal refrigerant evaporates slowly, you can open the cold storage door or set a fan to blow hot air into the room. Some equipment has a thermal insulation layer, the liquid evaporates slowly, and the refrigerant is difficult to clean. For example, a certain pipe on the circulation barrel leaks, or there is oil that cannot be discharged, and a small amount of ammonia liquid that cannot be discharged by the ammonia pump will naturally evaporate for a long time and delay the use. The above partial ammonia extraction method can be used to treat the ammonia liquid, and the existing problems can be properly handled under safe conditions.
(4) In the process of extracting the refrigerant, attention should be paid to the changes in the temperature and pressure of the machinery and equipment. If it is abnormal, the reason should be found out, and the extraction will be performed after the removal.
(5) When the system discharges residual ammonia, the valve in the supermarket refrigerated showcase should not be opened too large, and there should be sufficient water to dissolve, especially in cities. In addition, all valves should be opened and connected to the discharge pipe, otherwise the ammonia will not be discharged cleanly and personnel will be injured during equipment maintenance.
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